Fricative

[Sarah]

Produced by the friction or rustling of the breath, intonatedor unintonated, through a narrow opening between two of the mouthorgans; uttered through a close approach, but not with a completeclosure, of the organs of articulation, and hence capable of beingcontinued or prolonged; -- said of certain consonantal sounds, as f,v, s, z, etc.-- n.

[Sarah]

A strong sound or word that produces a strong friction in the vocal tract.

[Lanell]

Denoting a type of consonant made by the friction of breath in a narrow opening, producing a turbulent air flow.